JP2022021630A - Inner periphery seal structure, seal structure, and valve - Google Patents

Inner periphery seal structure, seal structure, and valve Download PDF

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JP2022021630A
JP2022021630A JP2020125325A JP2020125325A JP2022021630A JP 2022021630 A JP2022021630 A JP 2022021630A JP 2020125325 A JP2020125325 A JP 2020125325A JP 2020125325 A JP2020125325 A JP 2020125325A JP 2022021630 A JP2022021630 A JP 2022021630A
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valve body
seal
valve
sealing
locking
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JP6871655B1 (en
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保浩 徳谷
Yasuhiro Tokutani
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Okumura Engineering Corp OKM
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Okumura Engineering Corp OKM
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Priority to JP2020125325A priority Critical patent/JP6871655B1/en
Priority to CN202080003602.6A priority patent/CN115605698A/en
Priority to KR1020207038102A priority patent/KR102529296B1/en
Priority to PCT/JP2020/040312 priority patent/WO2022018878A1/en
Priority to PH12021550080A priority patent/PH12021550080A1/en
Priority to TW110102367A priority patent/TWI757062B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/46—Attachment of sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226—Shaping or arrangements of the sealing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

To provide an inner periphery seal structure which enables reduction of operation torque for closing a valve element, and to provide a seat structure and a valve.SOLUTION: An inner periphery seal structure 16 is provided at a seat ring 12 of a butterfly valve 10 and expands from an inner peripheral surface 12i of the seat ring 12, and an outer peripheral surface 14s of a valve element 14, to which a fluid pressure is applied, contacts with the inner periphery seal structure 16. The inner periphery seal structure 16 includes: a first seal surface 18 (1) which may be stopped by the outer peripheral surface 14s of the valve element 14 contacting therewith; an engagement protruding part 20 which restricts rotation of the valve element 14; and an engagement seal surface 18 (3) which may be stopped by the outer peripheral surface 14s contacting therewith. The first seal surface 18 (1), the engagement seal surface 18 (3), and the engagement protruding part 20 are arranged in this order in a direction in which the outer peripheral surface 14s of the valve element 14 is moved by rotation of the valve element 14. The engagement seal surface 18 (3) has a seal quantity larger than that of the first seal surface 18 (1).SELECTED DRAWING: Figure 1

Description

本願発明は、バタフライバルブ等のバルブを構成する内周シール構造、シート構造、及びバルブに関する。 The present invention relates to an inner peripheral seal structure, a seat structure, and a valve constituting a valve such as a butterfly valve.

従来から、流体の流れを閉鎖又は開放するためにバタフライバルブ（バルブ）が使用されている。図７に、一例として、バタフライバルブ１００を示す。バタフライバルブ１００は、弁箱１０２と、シートリング１０４と、弁体１０６と、を備えている。弁箱１０２とシートリング１０４とは、互いに係合されて組み合わされている。弁体１０６は、シートリング１０４の流路１０８内に配置される。弁体１０６は、回転中心Ｃ０のまわりに回転するように構成されている。シートリング１０４は、内周１０４ｉに、弁体１０６が当接する凸面形状のシール部（内周シール構造）１１０を有している。 Traditionally, butterfly valves (valves) have been used to close or open the flow of fluid. FIG. 7 shows a butterfly valve 100 as an example. The butterfly valve 100 includes a valve box 102, a seat ring 104, and a valve body 106. The valve box 102 and the seat ring 104 are engaged and combined with each other. The valve body 106 is arranged in the flow path 108 of the seat ring 104. The valve body 106 is configured to rotate around the center of rotation C0. The seat ring 104 has a convex seal portion (inner circumference seal structure) 110 with which the valve body 106 abuts on the inner circumference 104i.

弁体１０６は、流体を止める時、弁体１０６を、図７に示す締め切り位置まで回転させる。バタフライバルブ１００は、締め切り位置において、ステンレス等の金属から構成された弁体１０６の外周面１０６ｓが、ゴム等の弾性部材から構成されたシートリング１０４のシール部１１０に入り込む(図７において、入り込む深さであるシール量をＳＷで示す。)。弁体１０６を閉じるために締め切り位置まで回転させるには、シール部１１０からの付勢力及び流体圧力に抗した操作トルクが必要となる。すなわち、ＳＷが深くてシール部１１０からの付勢力が大きくなると、操作トルクが大きくなる。しかし、操作トルクが大きくなると、弁体１０６を回転させるための回転駆動手段の規模が大きくなる。なお、バタフライバルブの回転駆動手段に関する文献が存在する（特許文献１参照。）。しかし、本願発明に関連するものはない。 The valve body 106 rotates the valve body 106 to the deadline position shown in FIG. 7 when the fluid is stopped. In the butterfly valve 100, at the deadline position, the outer peripheral surface 106s of the valve body 106 made of a metal such as stainless steel enters the seal portion 110 of the seat ring 104 made of an elastic member such as rubber (in FIG. 7). The amount of seal, which is the depth, is indicated by SW). In order to rotate the valve body 106 to the deadline position in order to close it, an operating torque that resists the urging force and the fluid pressure from the seal portion 110 is required. That is, when the SW is deep and the urging force from the seal portion 110 is large, the operating torque is large. However, as the operating torque increases, the scale of the rotary drive means for rotating the valve body 106 increases. There is a document relating to the rotation driving means of the butterfly valve (see Patent Document 1). However, nothing is related to the invention of the present application.

特開２００３－１８５０４７号公報Japanese Patent Application Laid-Open No. 2003-185047

本願発明の目的は、弁体を閉じるための操作トルクを低減できる内周シール構造、シート構造、及びバルブを提供することにある。 An object of the present invention is to provide an inner peripheral seal structure, a seat structure, and a valve capable of reducing an operating torque for closing a valve body.

本願発明の内周シール構造は、バルブのシートリングに備えられ、該シートリングの内周面から膨出し、流体圧力が負荷される弁体の外周面が当接する内周シール構造であり、
凹面形状であり、前記弁体の前記外周面が当接して停止可能な第１シール面と、
前記弁体が係止され、該弁体の回転が規制される係止凸部と、
前記弁体が前記係止凸部に係止された時に、該弁体の前記外周面が当接する係止シール面と、
を備え、
前記弁体の回転により該弁体の前記外周面が移動する方向に、前記第１シール面、前記係止シール面、前記係止凸部の順に配置され、
前記第１シール面よりも前記係止シール面の方が、前記弁体の前記外周面が入り込む深さが大きく構成されたことを特徴とする。 The inner peripheral seal structure of the present invention is provided in the seat ring of the valve, and is an inner peripheral seal structure that bulges from the inner peripheral surface of the seat ring and abuts on the outer peripheral surface of the valve body to which the fluid pressure is applied.
The first sealing surface, which has a concave shape and can be stopped by contacting the outer peripheral surface of the valve body,
A locking convex portion in which the valve body is locked and rotation of the valve body is restricted,
When the valve body is locked to the locking convex portion, the locking seal surface with which the outer peripheral surface of the valve body abuts and
Equipped with
The first seal surface, the locking seal surface, and the locking convex portion are arranged in this order in the direction in which the outer peripheral surface of the valve body moves due to the rotation of the valve body.
The locking seal surface is characterized in that the depth into which the outer peripheral surface of the valve body enters is larger than that of the first seal surface.

また、本願発明の内周シール構造は、前記内周シール構造において、前記弁体の回転により該弁体の前記外周面が移動する方向に、前記第１シール面、前記係止シール面、前記係止凸部の順に配置されたことを特徴とする。 Further, in the inner peripheral seal structure of the present invention, the first seal surface, the locking seal surface, and the said in the direction in which the outer peripheral surface of the valve body moves due to the rotation of the valve body. It is characterized in that it is arranged in the order of the locking convex portions.

また、本願発明の内周シール構造は、前記内周シール構造において、凹面形状であり、前記弁体の前記外周面が当接して停止可能であり、前記第１シール面に連続する第２シール面を備え、
前記弁体の回転による該弁体の前記外周面が移動する方向に、前記第１シール面、前記第２シール面、前記係止シール面、前記係止凸部の順に配置され、
前記第１シール面よりも前記第２シール面の方が、シール量が大きくなるように構成され、
前記第２シール面よりも前記係止シール面の方が、シール量が大きくなるように構成されたことを特徴とする。 Further, the inner peripheral seal structure of the present invention has a concave shape in the inner peripheral seal structure, the outer peripheral surface of the valve body abuts and can be stopped, and the second seal continuous with the first seal surface. With a face,
The first seal surface, the second seal surface, the locking seal surface, and the locking convex portion are arranged in this order in the direction in which the outer peripheral surface of the valve body moves due to the rotation of the valve body.
The second sealing surface is configured to have a larger sealing amount than the first sealing surface.
The locking seal surface is configured to have a larger sealing amount than the second seal surface.

また、本願発明のシート構造は、バルブのシートリングに備えられたシート構造であり、
前記請求項１又は２に記載する内周シール構造と、
前記弁体の回転中心を構成する弁棒が挿入されるシート側弁棒孔と、
前記シート側弁棒孔の周辺に設けられ、前記弁体が有する弁体側弁棒孔の周辺の弁体側当接面が当接されるシート側当接面と、
前記第１シール面に連続し、前記シート側当接面まで延びる連続第１シール面と、
前記係止凸部に連続し、前記シート側当接面まで延びる連続係止凸部と、
前記係止シール面に連続し、前記シート側当接面まで延びる連続係止シール面と、を備え、
前記連続第１シール面、前記連続係止凸部、及び連続係止シール面は、前記弁体の前記外周面と弁体側当接面との間に連接された弁体連接面の側辺に対して、当接した時に全体が密着する形状を有することを特徴とする。 Further, the seat structure of the present invention is a seat structure provided in the seat ring of the valve.
The inner peripheral seal structure according to claim 1 or 2,
The seat side valve rod hole into which the valve rod constituting the rotation center of the valve body is inserted,
A seat-side contact surface provided around the seat-side valve rod hole and to which the valve body-side contact surface around the valve body-side valve rod hole of the valve body is in contact with the seat-side contact surface.
A continuous first sealing surface that is continuous with the first sealing surface and extends to the sheet-side contact surface,
A continuous locking convex portion that is continuous with the locking convex portion and extends to the sheet-side contact surface, and a continuous locking convex portion.
A continuous locking seal surface that is continuous with the locking seal surface and extends to the sheet-side contact surface is provided.
The continuous first sealing surface, the continuous locking convex portion, and the continuous locking sealing surface are formed on the side sides of the valve body connecting surface connected between the outer peripheral surface of the valve body and the valve body side contact surface. On the other hand, it is characterized by having a shape in which the whole is in close contact when abutted.

また、本願発明のバルブは、前記内周シール構造を含むことを特徴とする。 Further, the valve of the present invention is characterized by including the inner peripheral seal structure.

本願発明の内周シール構造によれば、弁体の外周面が当接して停止可能な係止シール面とは別個に、弁体の外周面が当接して停止可能な第１シール面を備えているため、第１シール面よりもシール量が大きい係止シール面で停止させないで、シール量が小さくシートリングからの付勢力が、より小さい第１シール面で停止させるように操作トルクを設定できる。これにより、より小さい操作トルクにより弁体を回転させて閉じることができ、操作トルクを低減できる。このため、弁体を回転させるための回転駆動手段の規模を縮小することができる。なお、流体圧力が小さい場合には、シール量が小さい第１シール面で停止させてもシール性能を維持できる。よって、弁体を閉じるための操作トルクを低減しながらも、シール性能を維持できる。 According to the inner peripheral sealing structure of the present invention, a first sealing surface that can be stopped by contacting the outer peripheral surface of the valve body is provided separately from the locking seal surface that can be stopped by contacting the outer peripheral surface of the valve body. Therefore, the operating torque is set so that the sealing amount is small and the urging force from the seat ring is stopped at the smaller first sealing surface without stopping at the locking sealing surface where the sealing amount is larger than the first sealing surface. can. As a result, the valve body can be rotated and closed with a smaller operating torque, and the operating torque can be reduced. Therefore, the scale of the rotation driving means for rotating the valve body can be reduced. When the fluid pressure is small, the sealing performance can be maintained even if the seal is stopped at the first sealing surface having a small sealing amount. Therefore, the sealing performance can be maintained while reducing the operating torque for closing the valve body.

本願発明に係る内周シール構造を示す平面図である。It is a top view which shows the inner peripheral seal structure which concerns on this invention. 図１に示す内周シール構造を説明するための平面断面図であり、同図（ａ）は、弁体がシートリングに当接する直前の状態を示す図であり、同図（ｂ）は、弁体が第１シール面に当接した状態を示す図であり、同図（ｃ）は、弁体が第２シール面に当接した状態を示す図であり、同図（ｄ）は、弁体が係止凸部に係止された状態を示す図である。FIG. 1 is a plan sectional view for explaining the inner peripheral seal structure shown in FIG. 1, FIG. 1A is a diagram showing a state immediately before the valve body abuts on the seat ring, and FIG. It is a figure which shows the state which the valve body came into contact with the 1st seal surface, FIG. It is a figure which shows the state which the valve body is locked to the locking convex part. 同図（ａ）は、本願発明に係るシート構造を示す斜視図であり、同図（ｂ）は、弁体を示す斜視図である。FIG. 3A is a perspective view showing a seat structure according to the present invention, and FIG. 9B is a perspective view showing a valve body. 本願発明に係る内周シール構造及びシート構造を備えたバルブの一例を示す正面断面図である。It is a front sectional view which shows an example of the valve which provided the inner peripheral seal structure and the seat structure which concerns on this invention. シール面が凹曲面形状であることによる作用効果を説明するための図であり、同図（ａ）は本願発明に係るシール面を示す概略平面図であり、同図（ｂ）は従来技術に係るシール面を示す概略平面図であり、同図（ｃ）はシール量について本願発明に係るシール面と従来技術に係るシール面とを比較するグラフである。It is a figure for demonstrating the action effect by having a concave curved surface shape of a sealing surface, FIG. It is a schematic plan view which shows the said sealing surface, and FIG. 内周シール構造（シール部）とシート側当接面との繋ぎ部の作用効果を説明するための図であり、同図（ａ）は本願発明に係る繋ぎ部を示す概略斜視図であり、同図（ｂ）は従来技術に係る繋ぎ部を示す概略斜視図である。It is a figure for demonstrating the action effect of the joint part between the inner peripheral seal structure (seal part) and the contact surface on a sheet side, and FIG. FIG. 3B is a schematic perspective view showing a joint portion according to the prior art. 従来のバルブを示す正面断面図である。It is a front sectional view which shows the conventional valve.

本願発明に係る内周シール構造、シート構造、及びバタフライバルブ（バルブ）の実施形態について図面に基づいて説明する。図１～図４において、符号１６は、本願発明の内周シール構造である。図３及び図４において、符号３４は本願発明のシート構造である。図２及び図４において、符号１０は、本願発明のバタフライバルブである。 An embodiment of the inner peripheral seal structure, the seat structure, and the butterfly valve (valve) according to the present invention will be described with reference to the drawings. In FIGS. 1 to 4, reference numeral 16 is an inner peripheral seal structure of the present invention. In FIGS. 3 and 4, reference numeral 34 is the sheet structure of the present invention. In FIGS. 2 and 4, reference numeral 10 is a butterfly valve of the present invention.

（構成）
バタフライバルブ１０は、図２に示すように、弁箱１１４と、弁箱１１４と組み合わされたシートリング１２と、を備えている。弁箱１１４は、例えば、アルミニウム（純アルミ又はアルミ合金）から形成される。弁箱１１４は、アルミニウム以外の金属から形成されてもよい。シートリング１２は、例えば、ＥＰＤＭ（エチレンプロピレンゴム）又はＮＢＲ（ニトリゴム）から形成され、他のゴム又は樹脂から形成されてもよい。また、バタフライバルブ１０は、シートリング１２内に配置された弁体１４と、弁体１４の上部及び下部に固定された２本の弁棒２２（図３（ｂ）に示す。）と、を備えている。弁体１４は、略円盤形状又は略円板形状である。弁体１４は、例えば、ステンレスから形成される。弁体１４は、ステンレス以外の金属から形成されてもよい。弁体１４は、上部及び下部において、弁棒２２を挿入して固定する弁体側弁棒孔２６（図３（ｂ）に示す。）を備えている。弁棒２２は、ステンレスから形成され、ステンレス以外の金属から形成されてもよい。弁棒２２は、弁箱１１４及びシートリング１２のシート側弁棒孔２４（図３（ａ）に示す。）に回転可能に貫通される。バタフライバルブ１０は、弁箱１１４に連結され、回転駆動手段を有するバルブ駆動部（図示しない）に固定される固定手段１４０（図４に示す）を備える。固定手段１４０は、例えば、アルミニウムから形成され、アルミニウム以外の金属から形成されてもよい。 (Constitution)
As shown in FIG. 2, the butterfly valve 10 includes a valve box 114 and a seat ring 12 combined with the valve box 114. The valve box 114 is formed of, for example, aluminum (pure aluminum or an aluminum alloy). The valve box 114 may be made of a metal other than aluminum. The sheet ring 12 is formed of, for example, EPDM (ethylene propylene rubber) or NBR (nitron rubber), and may be formed of another rubber or resin. Further, the butterfly valve 10 includes a valve body 14 arranged in the seat ring 12 and two valve rods 22 (shown in FIG. 3B) fixed to the upper part and the lower part of the valve body 14. I have. The valve body 14 has a substantially disk shape or a substantially disk shape. The valve body 14 is made of, for example, stainless steel. The valve body 14 may be formed of a metal other than stainless steel. The valve body 14 is provided with a valve body side valve rod hole 26 (shown in FIG. 3 (b)) in which the valve rod 22 is inserted and fixed at the upper part and the lower part. The valve stem 22 is made of stainless steel and may be made of a metal other than stainless steel. The valve rod 22 is rotatably penetrated through the seat side valve rod hole 24 (shown in FIG. 3A) of the valve box 114 and the seat ring 12. The butterfly valve 10 includes a fixing means 140 (shown in FIG. 4) that is connected to the valve box 114 and fixed to a valve driving unit (not shown) having a rotary driving means. The fixing means 140 is formed of, for example, aluminum and may be formed of a metal other than aluminum.

（内周シール構造（シール部）１６）
シートリング１２は、図１に示すように、シートリング１２の内周面１２ｉから膨出し、流体圧力が負荷される弁体１４の外周面１４ｓが当接する内周シール構造１６を備える。内周シール構造１６は、図４に示すように、正面視において、シートリング１２の左右２箇所（回転中心Ｃ１を対称軸とした対称な位置）に備えられる。内周シール構造１６は、弁体１４の外周面１４ｓが当接して停止可能な第１シール面１８（１）と、弁体１４の外周面１４ｓが当接して停止し、前記第１シール面１８（１）に連続する第２シール面１８（２）と、を備える。第１シール面１８（１）及び第２シール面１８（２）は、少しでもシール量を少なくするために、凹曲面形状を有している。また、内周シール構造１６は、弁体１４の外周面１４ｓが当接して停止し、第２シール面１８（２）に連続する係止シール面１８（３）と、弁体１４の外周面１４ｓが係止され、弁体１４の回転が規制される係止凸部２０と、を備える。弁体１４の外周面１４ｓは、係止凸部２０に係止されることにより、係止シール面１８（３）に当接して停止可能なように構成されている。また、内周シール構造１６は、弁体１４の回転により弁体１４の外周面１４ｓが移動する方向に、第１シール面１８（１）、第２シール面１８（２）、係止シール面１８（３）、係止凸部２０の順に配置されている。 (Inner circumference seal structure (seal part) 16)
As shown in FIG. 1, the seat ring 12 includes an inner peripheral seal structure 16 that bulges from the inner peripheral surface 12i of the seat ring 12 and is in contact with the outer peripheral surface 14s of the valve body 14 to which the fluid pressure is applied. As shown in FIG. 4, the inner peripheral seal structure 16 is provided at two positions on the left and right sides of the seat ring 12 (symmetrical positions with the rotation center C1 as the axis of symmetry) in the front view. In the inner peripheral seal structure 16, the first seal surface 18 (1) that can be stopped by abutting the outer peripheral surface 14s of the valve body 14 and the outer peripheral surface 14s of the valve body 14 abut and stop, and the first sealing surface is stopped. A second sealing surface 18 (2) continuous with 18 (1) is provided. The first sealing surface 18 (1) and the second sealing surface 18 (2) have a concave curved surface shape in order to reduce the sealing amount as much as possible. Further, in the inner peripheral seal structure 16, the outer peripheral surface 14s of the valve body 14 abuts and stops, and the locking seal surface 18 (3) continuous with the second seal surface 18 (2) and the outer peripheral surface of the valve body 14 A locking convex portion 20 is provided, in which the 14s are locked and the rotation of the valve body 14 is restricted. The outer peripheral surface 14s of the valve body 14 is configured to come into contact with the locking seal surface 18 (3) and stop by being locked to the locking convex portion 20. Further, in the inner peripheral seal structure 16, the first seal surface 18 (1), the second seal surface 18 (2), and the locking seal surface are in the direction in which the outer peripheral surface 14s of the valve body 14 moves due to the rotation of the valve body 14. 18 (3) and the locking convex portion 20 are arranged in this order.

内周シール構造１６において、第１シール面１８（１）よりも係止シール面１８（３）の方が、弁体１４の外周面１４ｓが入り込む深さであるシール量（第１シール面１８（１）のシール量：ＳＷ１、係止シール面のシール量：ＳＷ３）が大きくなるように構成されている。また、第１シール面１８（１）よりも第２シール面１８（２）の方が、シール量（第２シール面１８（２）のシール量：ＳＷ２）が大きくなるように構成されている。また、第２シール面１８（２）よりも係止シール面１８（３）の方が、シール量が大きくなるように構成されている。すなわち、第１シール面１８（１）で停止させる場合、第２シール面１８（２）で停止させる場合、係止シール面１８（３）停止させる場合、の順に、シートリング１２からの付勢力が大きくなっていく。このため、弁体１４を閉じるための操作トルクは、第１シール面１８（１）で停止させる場合、第２シール面１８（２）で停止させる場合、係止シール面１８（３）停止させる場合、の順に、大きくなっていく。 In the inner peripheral sealing structure 16, the sealing amount (first sealing surface 18) is such that the locking sealing surface 18 (3) is deeper than the first sealing surface 18 (1) in which the outer peripheral surface 14s of the valve body 14 enters. The seal amount of (1): SW1 and the seal amount of the locking seal surface: SW3) are configured to be large. Further, the second seal surface 18 (2) is configured to have a larger seal amount (seal amount of the second seal surface 18 (2): SW2) than the first seal surface 18 (1). .. Further, the locking seal surface 18 (3) is configured to have a larger sealing amount than the second sealing surface 18 (2). That is, the urging force from the seat ring 12 is in the order of stopping at the first sealing surface 18 (1), stopping at the second sealing surface 18 (2), and stopping at the locking seal surface 18 (3). Is getting bigger. Therefore, the operating torque for closing the valve body 14 is stopped at the first sealing surface 18 (1), stopped at the second sealing surface 18 (2), and stopped at the locking seal surface 18 (3). In the case, it increases in the order of.

（シート構造３４）
シートリング１２は、図３に示すように、２個（正面視において左右）の内周シール構造１６を含むシート構造３４を備える。図３（ａ）において、回転中心Ｃ１以外を示す１点鎖線は、シール面の場合には、中心線（谷筋）を示し、凸部の場合には、稜線を示す。また、図３（ａ）において、ドット線は、内周シール構造１６と後述のシート連接面３１との境界を示す線である。図３（ｂ）において、ドット線は、弁体１４の外周面１４ｓと後述の弁体連接面３２との境界を示す線であり、２点鎖線は、弁体連接面３２と後述の弁体側当接面２８との境界を示す線である。シート構造３４は、図４におけるシートリング１２の上部側及び下部側の２箇所に備えられる。 (Seat structure 34)
As shown in FIG. 3, the seat ring 12 includes a seat structure 34 including two (left and right in front view) inner peripheral seal structures 16. In FIG. 3A, the alternate long and short dash line indicating other than the rotation center C1 indicates a center line (valley line) in the case of a sealing surface, and indicates a ridge line in the case of a convex portion. Further, in FIG. 3A, the dot line is a line indicating a boundary between the inner peripheral seal structure 16 and the sheet connecting surface 31 described later. In FIG. 3B, the dotted line is a line indicating the boundary between the outer peripheral surface 14s of the valve body 14 and the valve body connecting surface 32 described later, and the two-dot chain line is the valve body connecting surface 32 and the valve body side described later. It is a line which shows the boundary with the contact surface 28. The seat structure 34 is provided at two locations on the upper side and the lower side of the seat ring 12 in FIG.

シート構造３４は、図３（ａ）に示すように、弁体１４の回転中心Ｃ１を構成する弁棒２２が挿入されるシート側弁棒孔２４を備える。また、シート構造３４は、シート側弁棒孔２４の周辺に設けられ、弁体１４が有する弁体側弁棒孔２６の周辺の弁体側当接面２８が当接されるシート側当接面３０を備える。なお、図３（ａ）においてシート側当接面３０を示す破線の範囲内が、弁体側当接面２８に当接する範囲である。また、シート構造３４は、第１シール面１８（１）に連続し、シート側当接面３０まで延びる連続第１シール面１８（１）ｅｘと、第２シール面１８（２）に連続し、シート側当接面３０まで延びる連続第２シール面１８（２）ｅｘと、を備える。また、シート構造３４は、係止シール面１８（３）に連続し、シート側当接面３０まで延びる連続係止シール面１８（３）ｅｘと、係止凸部２０に連続し、シート側当接面３０まで延びる連続係止凸部２０ｅｘと、を備える。連続第１シール面１８（１）ｅｘ、連続第２シール面１８（２）ｅｘ、連続係止シール面１８（３）ｅｘ、及び連続係止凸部２０ｅｘは、弁体１４の外周面１４ｓと弁体側当接面２８との間に連接された弁体連接面３２の湾曲形状の側辺３２ｓｉに対して、当接した時に全体が密着する湾曲形状を有する。連続第１シール面１８（１）ｅｘ、連続第２シール面１８（２）ｅｘ、及び連続係止シール面１８（３）ｅｘのシール量は、シート側当接面３０へいくにしたがって小さくなる。 As shown in FIG. 3A, the seat structure 34 includes a seat-side valve rod hole 24 into which a valve rod 22 constituting the rotation center C1 of the valve body 14 is inserted. Further, the seat structure 34 is provided around the seat side valve rod hole 24, and the seat side contact surface 30 with which the valve body side contact surface 28 around the valve body side valve rod hole 26 of the valve body 14 is abutted. To prepare for. In addition, in FIG. 3A, the range of the broken line showing the seat side contact surface 30 is the range of contact with the valve body side contact surface 28. Further, the sheet structure 34 is continuous with the first sealing surface 18 (1) and is continuous with the continuous first sealing surface 18 (1) ex extending to the sheet side contact surface 30 and the second sealing surface 18 (2). A continuous second sealing surface 18 (2) ex extending to the sheet-side contact surface 30 is provided. Further, the sheet structure 34 is continuous with the locking seal surface 18 (3) and is continuous with the continuous locking seal surface 18 (3) ex extending to the sheet side contact surface 30 and the locking convex portion 20, and is continuous with the seat side. A continuous locking convex portion 20ex extending to the contact surface 30 is provided. The continuous first sealing surface 18 (1) ex, the continuous second sealing surface 18 (2) ex, the continuous locking seal surface 18 (3) ex, and the continuous locking convex portion 20ex are the outer peripheral surface 14s of the valve body 14. It has a curved shape in which the entire surface is in close contact with the curved side side 32si of the valve body connecting surface 32 connected to the valve body side contact surface 28. The amount of sealing of the continuous first sealing surface 18 (1) ex, the continuous second sealing surface 18 (2) ex, and the continuous locking sealing surface 18 (3) ex becomes smaller toward the sheet side contact surface 30. ..

（作用及び効果）
（内周シール構造１６）
本願発明のバタフライバルブ１０の内周シール構造１６の作用及び効果について、図１及び図２に従って、以下に説明する。内周シール構造１６において、弁体１４を閉じるために必要な操作トルクは、シール量が大きくなる順、すなわち、シール量が最も小さいＳＷ１である第１シール面１８（１）、シール量がＳＷ２より大きくＳＷ３より小さい第２シール面１８（２）、シール量が最も大きいＳＷ３である係止シール面１８（３）の順に大きくなる。また、流体圧力が大きいほどシール量を大きくする必要がある。このため、例えば、流体圧力が０．５ＭＰａの場合、弁体１４の外周面１４ｓを第１シール面１８（１）で停止させて弁体１４を閉じ、流体圧力が１．０ＭＰａの場合、弁体１４の外周面１４ｓを第２シール面１８（２）で停止させて弁体１４を閉じ、流体圧力が１．０ＭＰａを超える場合、弁体１４の外周面１４ｓを係止シール面１８（３）で停止させて弁体１４を閉じるように、操作トルクを設定できる。弁体１４の外周面１４ｓを第１シール面１８（１）で停止させて弁体１４を閉じるように操作トルクを設定した場合、操作トルクは最も小さくなる。このため、小さい操作トルクにより弁体１４を閉じることができ、弁体の回転駆動手段の規模を縮小できる。また、小さいシール量ＳＷ１の第１シール面１８（１）に弁体１４の外周面１４ｓを当接させることにより、シートリング１２及び弁体１４の高寿命化を図ることができる。この場合、シール量ＳＷ１は最も小さいが、弁体１４が受ける流体圧力が０．５ＭＰａで最も小さいため、シール性能維持のために充分である。よって、小さい操作トルクにより弁体１４を閉じるとともに、シール性能を維持することができる。 (Action and effect)
(Inner circumference seal structure 16)
The operation and effect of the inner peripheral seal structure 16 of the butterfly valve 10 of the present invention will be described below with reference to FIGS. 1 and 2. In the inner peripheral seal structure 16, the operating torque required to close the valve body 14 is in descending order of the seal amount, that is, the first seal surface 18 (1), which is SW1 having the smallest seal amount, and the seal amount is SW2. The second sealing surface 18 (2), which is larger and smaller than SW3, and the locking sealing surface 18 (3), which is SW3 having the largest sealing amount, become larger in this order. Further, it is necessary to increase the sealing amount as the fluid pressure increases. Therefore, for example, when the fluid pressure is 0.5 MPa, the outer peripheral surface 14s of the valve body 14 is stopped at the first sealing surface 18 (1) to close the valve body 14, and when the fluid pressure is 1.0 MPa, the valve. When the outer peripheral surface 14s of the body 14 is stopped at the second sealing surface 18 (2) to close the valve body 14 and the fluid pressure exceeds 1.0 MPa, the outer peripheral surface 14s of the valve body 14 is locked to the sealing surface 18 (3). ) Can be stopped to close the valve body 14, and the operating torque can be set. When the operating torque is set so that the outer peripheral surface 14s of the valve body 14 is stopped at the first sealing surface 18 (1) and the valve body 14 is closed, the operating torque becomes the smallest. Therefore, the valve body 14 can be closed with a small operating torque, and the scale of the rotary driving means of the valve body can be reduced. Further, by bringing the outer peripheral surface 14s of the valve body 14 into contact with the first seal surface 18 (1) of the small seal amount SW1, the life of the seat ring 12 and the valve body 14 can be extended. In this case, the sealing amount SW1 is the smallest, but the fluid pressure received by the valve body 14 is the smallest at 0.5 MPa, which is sufficient for maintaining the sealing performance. Therefore, the valve body 14 can be closed and the sealing performance can be maintained with a small operating torque.

また、内周シール構造１６によれば、流体圧力が１．０ＭＰａであり、弁体１４の外周面１４ｓを第２シール面１８（２）で停止させて弁体１４を閉じるように操作トルクを設定した場合でも、弁体１４の外周面１４ｓを係止シール面１８（３）で停止させて弁体１４を閉じるように操作トルクを設定した場合に比して、小さい操作トルクにより弁体１４を閉じることができる。また、内周シール構造１６によれば、弁体１４の外周面１４ｓを係止シール面１８（３）で停止させて弁体１４を閉じる場合に比して、小さい操作トルクで弁体１４を閉じるための方法として、第１シール面１８（１）又は第２シール面１８（２）のいずれか一方を選択することができる。また、内周シール構造１６によれば、流体圧力が１．０ＭＰａを超える高圧である場合、弁体１４の外周面１４ｓを停止させて弁体１４を閉じる位置として、係止シール面１８（３）を選択することができる。この場合、想定外に大きな操作トルクが生じたとしても、弁体１４が係止凸部２０に係止されて止まり、弁体１４が係止シール面１８（３）から離脱することはない。 Further, according to the inner peripheral seal structure 16, the fluid pressure is 1.0 MPa, and the operation torque is applied so as to stop the outer peripheral surface 14s of the valve body 14 at the second seal surface 18 (2) and close the valve body 14. Even if it is set, the valve body 14 has a smaller operating torque than when the operating torque is set so that the outer peripheral surface 14s of the valve body 14 is stopped at the locking seal surface 18 (3) to close the valve body 14. Can be closed. Further, according to the inner peripheral seal structure 16, the valve body 14 can be operated with a smaller operating torque as compared with the case where the outer peripheral surface 14s of the valve body 14 is stopped at the locking seal surface 18 (3) to close the valve body 14. As a method for closing, either the first sealing surface 18 (1) or the second sealing surface 18 (2) can be selected. Further, according to the inner peripheral seal structure 16, when the fluid pressure is a high pressure exceeding 1.0 MPa, the locking seal surface 18 (3) is set as a position where the outer peripheral surface 14s of the valve body 14 is stopped and the valve body 14 is closed. ) Can be selected. In this case, even if an unexpectedly large operating torque is generated, the valve body 14 is locked to the locking convex portion 20 and stops, and the valve body 14 does not separate from the locking seal surface 18 (3).

また、弁体１４がオーバーランして係止凸部２０に係止され係止シール面１８（３）で止まった時、シール量（弁体１４が内周シール構造１６を押し潰す量、すなわち弁体１４が入り込む深さ）は大きく、シール性能は向上する。但し、その分、操作トルクは大きくなる。すなわち、設定した操作トルクで、弁体１４を回転させれば、シール性能を維持できる。弁体開度の調整作業において、弁体１４がシール部を徒過して振り切ることは、気にしなくて良くなり、作業性は向上する。また、内周シール構造１６の摩耗等（図５（ａ）に摩耗後のシール面１９を示す）によりシール性能が低下する。この時、図５（ａ）に２点鎖線で示すように、弁体１４を閉じる方向に、弁体１４を締め切り位置より余分に回転させるように調整することで（駆動部のストッパーの調整など。）、シール性能の回復を容易に見込める。このため、製品寿命を長くすることができる。なお、従来技術の場合、製品寿命を長くするためには、摩耗してもシール性能を維持できるように、シール量を大きく設定しておく必要がある。例えば、図５（ｂ）に２点鎖線で示すように、より大きなシール面１１３を形成するように、シール量を大きく設定しておく必要がある。このため、必要な操作トルクは大きくなる。 Further, when the valve body 14 overruns and is locked to the locking convex portion 20 and stops at the locking seal surface 18 (3), the sealing amount (the amount by which the valve body 14 crushes the inner peripheral seal structure 16, that is, The depth at which the valve body 14 enters is large, and the sealing performance is improved. However, the operating torque increases accordingly. That is, if the valve body 14 is rotated with the set operating torque, the sealing performance can be maintained. In the valve body opening adjustment work, it is not necessary for the valve body 14 to shake off the seal portion by mistake, and the workability is improved. Further, the sealing performance is deteriorated due to the wear of the inner peripheral seal structure 16 (the sealing surface 19 after the wear is shown in FIG. 5A). At this time, as shown by the two-dot chain line in FIG. 5A, the valve body 14 is adjusted so as to rotate excessively from the deadline position in the closing direction of the valve body 14 (adjustment of the stopper of the drive unit, etc.). .), Recovery of sealing performance can be easily expected. Therefore, the product life can be extended. In the case of the prior art, in order to prolong the product life, it is necessary to set a large amount of sealing so that the sealing performance can be maintained even if it wears. For example, as shown by the two-dot chain line in FIG. 5B, it is necessary to set a large sealing amount so as to form a larger sealing surface 113. Therefore, the required operating torque is large.

また、内周シール構造１６によれば、弁体１４の回転により弁体１４の外周面１４ｓが移動する方向に、第１シール面１８（１）、第２シール面１８（２）、係止シール面１８（３）、係止凸部２０の順に配置されているため、第１シール面１８（１）で弁体１４が停止するように、操作トルクを設定した場合、確実に弁体１４の外周面１４ｓが第１シール面１８（１）に当接して停止する。すなわち、弁体１４が係止凸部２０に当たって停止して外周面１４ｓが第１シール面１８（１）に到達しないことはない。 Further, according to the inner peripheral seal structure 16, the first seal surface 18 (1), the second seal surface 18 (2), and the locking surface 14s move in the direction in which the outer peripheral surface 14s of the valve body 14 moves due to the rotation of the valve body 14. Since the sealing surface 18 (3) and the locking convex portion 20 are arranged in this order, when the operating torque is set so that the valve body 14 stops at the first sealing surface 18 (1), the valve body 14 is surely arranged. The outer peripheral surface 14s of the above comes into contact with the first sealing surface 18 (1) and stops. That is, the valve body 14 does not hit the locking convex portion 20 and stop, and the outer peripheral surface 14s does not reach the first sealing surface 18 (1).

ここで、シール面が凹曲面形状であることによる作用効果を、図５に基づいて、以下に説明する。図５において、Ｘ軸は弁体の外周面の移動量を示す。図５（ａ）及び（ｂ）において、斜線でハッチングした部分は、シートリングのシール部において弁体によって押し潰される部分である。図５（ｃ）において、Ｙ軸はシール量を示す。図５（ｃ）において、実線は、本願発明におけるシール量の変化を示し、２点鎖線は、従来技術におけるシール量の変化を示す。図５において、ＤＬは締め切り位置である。図５（ｃ）に示すように、本願発明の場合、シール量は徐々に増大していく。これに対して、従来技術の場合、シール量は０点から急激に増大する。このため、本願発明は、従来技術に比して、シール部を潰す総量は少なく、弁体を回転させて閉じるための操作トルクは少なくなる。 Here, the action and effect due to the concave curved surface shape of the sealing surface will be described below with reference to FIG. In FIG. 5, the X-axis shows the amount of movement of the outer peripheral surface of the valve body. In FIGS. 5A and 5B, the portion hatched by the diagonal line is a portion crushed by the valve body in the sealing portion of the seat ring. In FIG. 5 (c), the Y-axis indicates the amount of seal. In FIG. 5 (c), the solid line shows the change in the sealing amount in the present invention, and the two-dot chain line shows the change in the sealing amount in the prior art. In FIG. 5, DL is the deadline position. As shown in FIG. 5 (c), in the case of the present invention, the sealing amount gradually increases. On the other hand, in the case of the conventional technique, the sealing amount sharply increases from 0 point. Therefore, in the present invention, the total amount of crushing the seal portion is smaller and the operating torque for rotating and closing the valve body is smaller than that of the prior art.

（シート構造３４）
本願発明のバタフライバルブ１０のシート構造３４の作用及び効果について、図３に基づいて、以下に説明する。上述のように、連続第１シール面１８（１）ｅｘ、連続第２シール面１８（２）ｅｘ、連続係止シール面１８（３）ｅｘ、及び連続係止凸部２０ｅｘは、弁体１４の外周面１４ｓと弁体側当接面２８との間に連接された弁体連接面３２の湾曲形状の側辺３２ｓｉに対して、当接した時に全体が密着する湾曲形状を有している。このため、弁体１４を第１シール面１８（１）に当接させて閉じるように設定した場合、弁体１４の側辺３２ｓｉは、シートリング１２の連続第１シール面１８（１）ｅｘに当接する。すなわち、湾曲形状の側辺３２ｓｉの全体が湾曲形状の連続第１シール面１８（１）ｅｘに当接する。この時、弁体連接面３２がシート連接面３１に当接する。これにより、弁体１４とシートリング１２との当接面積を広くして、シール性能を向上させることができる。また、弁体１４の側辺３２ｓｉは所定のシール量で連続第１シール面１８（１）ｅｘに入り込んでいる。このため、シール性能を向上させることができる。弁体１４を第２シール面１８（２）に当接させて閉じるように設定した場合、及び、弁体１４を係止シール面１８（３）に当接させて閉じるように設定した場合も、同様にして、弁体１４の側辺３２ｓｉ近辺とシート側当接面３０とのシール性能を向上させることができる。特に、係止シール面１８（３）に当接させて閉じるように設定した場合には、弁体１４の側辺３２ｓｉの全体が連続係止凸部２０に当接するため、より当接面積を広くして、よりシール性能を向上させることができる。 (Seat structure 34)
The operation and effect of the seat structure 34 of the butterfly valve 10 of the present invention will be described below with reference to FIG. As described above, the continuous first sealing surface 18 (1) ex, the continuous second sealing surface 18 (2) ex, the continuous locking seal surface 18 (3) ex, and the continuous locking convex portion 20ex are the valve bodies 14 It has a curved shape in which the entire surface is in close contact with the curved side side 32si of the valve body connecting surface 32 connected between the outer peripheral surface 14s and the valve body side contact surface 28. Therefore, when the valve body 14 is set to be in contact with the first sealing surface 18 (1) and closed, the side side 32si of the valve body 14 is the continuous first sealing surface 18 (1) ex of the seat ring 12. Contact with. That is, the entire side side 32si of the curved shape abuts on the continuous first sealing surface 18 (1) ex of the curved shape. At this time, the valve body connecting surface 32 comes into contact with the seat connecting surface 31. As a result, the contact area between the valve body 14 and the seat ring 12 can be widened, and the sealing performance can be improved. Further, the side 32si of the valve body 14 penetrates into the continuous first sealing surface 18 (1) ex with a predetermined sealing amount. Therefore, the sealing performance can be improved. When the valve body 14 is set to be in contact with the second sealing surface 18 (2) and closed, and when the valve body 14 is set to be in contact with the locking seal surface 18 (3) and closed. Similarly, the sealing performance between the vicinity of the side side 32si of the valve body 14 and the seat side contact surface 30 can be improved. In particular, when the locking seal surface 18 (3) is set to abut and close, the entire side side 32si of the valve body 14 abuts on the continuous locking convex portion 20, so that the contact area is further increased. It can be made wider to further improve the sealing performance.

次に、図６に基づいて、本願発明のシート構造３４における内周シール構造（シール部）１６とシート側当接面３０との繋ぎ部３５の作用効果を説明する。図６（ａ）において、繋ぎ部３５を斜線のハッチングで示す。図６（ｂ）において、繋ぎ部１１２を斜線のハッチングで示す。図６（ａ）において、シール線（弁座）ＶＳを２点鎖線で示す。図６（ｂ）において、弁座稜線ＶＳを２点鎖線で示す。本願発明のシート構造３４は、内周シール構造１６及びシート側当接面３０が共に凹形状のため、繋ぎ部３５において、内周シール構造１６及びシート側当接面３０の形状をスムーズに繋げることができる。このため、繋ぎ部３５において、余計な操作トルクを必要としない。これに対して、従来技術においては、図６（ｂ）に示すように、シール部１１０は凸形状であるのに対してシート側当接面１１４は凹形状である。このため、繋ぎ部１１２には、凸から凹への切り替し部が必要となる。そこで、シール部１１０の形状とシート側当接面１１４の形状とをスムーズに繋げるためには、理論上必要な形状１１２ｏｒよりも幅の大きな形状１１２ｏｖが必要となった。これにより、必要な操作トルクは、大きくなった。また、この切り替し部が、シール性能不良の設計上の原因となりやすいので、実機でシール性能を確認する等の作業が必要であった。このため、従来技術の場合、多くの開発工数がかかっていた。しかし、本願発明は、このような作業が不要となり、開発の容易化につながる。 Next, based on FIG. 6, the operation and effect of the connecting portion 35 between the inner peripheral seal structure (sealing portion) 16 and the seat side contact surface 30 in the seat structure 34 of the present invention will be described. In FIG. 6A, the connecting portion 35 is shown by hatching with diagonal lines. In FIG. 6B, the connecting portion 112 is shown by hatching with diagonal lines. In FIG. 6A, the sealed wire (valve seat) VS is shown by a two-dot chain line. In FIG. 6B, the valve seat ridge line VS is shown by a two-dot chain line. In the sheet structure 34 of the present invention, since the inner peripheral seal structure 16 and the seat side contact surface 30 are both concave, the shapes of the inner peripheral seal structure 16 and the sheet side contact surface 30 are smoothly connected at the connecting portion 35. be able to. Therefore, the connecting portion 35 does not require an extra operating torque. On the other hand, in the prior art, as shown in FIG. 6B, the seal portion 110 has a convex shape, whereas the sheet-side contact surface 114 has a concave shape. Therefore, the connecting portion 112 needs a switching portion from convex to concave. Therefore, in order to smoothly connect the shape of the seal portion 110 and the shape of the sheet-side contact surface 114, a shape 112ov having a width larger than the theoretically required shape 112or is required. As a result, the required operating torque has increased. In addition, since this switching part tends to cause a design defect in sealing performance, it is necessary to check the sealing performance with an actual machine. Therefore, in the case of the conventional technology, a lot of development man-hours are required. However, the invention of the present application eliminates such work and leads to facilitation of development.

以上、本願発明の実施形態について説明したが、本願発明は上述の実施形態に限定されず、同一の作用及び効果が生じる範囲で適宜変更を加えて実施できる。例えば、本願発明のバルブは、バタフライバルブに限定されず、バルブの種類は限定されない。また、本願発明のバタフライバルブには、一軸偏心、二軸偏心及び三軸偏心のものが含まれる。また、第１シール面１８（１）及び第２シール面１８（２）の何れか一方のみを備える構成であってもよい。この場合、第１シール面１８（１）及び第２シール面１８（２）の何れか一方で弁体１４を閉じるように操作トルクを設定することにより、係止シール面１８（３）で閉じるよりも小さい操作トルクで閉じることができる。また、第１シール面１８（１）、第２シール面１８（２）、及び係止シール面１８（３）によって凹面を形成してもよい。 Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be appropriately modified as long as the same action and effect are produced. For example, the valve of the present invention is not limited to the butterfly valve, and the type of the valve is not limited. Further, the butterfly valve of the present invention includes uniaxial eccentricity, biaxial eccentricity and triaxial eccentricity. Further, the configuration may include only one of the first sealing surface 18 (1) and the second sealing surface 18 (2). In this case, by setting the operating torque so as to close the valve body 14 on either one of the first sealing surface 18 (1) and the second sealing surface 18 (2), the locking seal surface 18 (3) closes. It can be closed with a smaller operating torque. Further, a concave surface may be formed by the first sealing surface 18 (1), the second sealing surface 18 (2), and the locking sealing surface 18 (3).

１０：バタフライバルブ（バルブ）
１２：シートリング
１２ｉ：内周面
１４：弁体
１４ｓ：外周面
１６：内周シール構造
１８（１）：第１シール面
１８（１）ｅｘ：連続第１シール面
１８（２）：第２シール面
１８（２）ｅｘ：連続第２シール面
１８（３）：係止シール面
１８（３）ｅｘ：連続係止シール面
２０：係止凸部
２０ｅｘ：連続係止凸部
２２：弁棒
２４：シート側弁棒孔
２６：弁体側弁棒孔
２８：弁体側当接面
３０：シート側当接面
３１：シート連接面
３２：弁体連接面
３２ｓｉ：側辺
３３：シート側当接面
３４：シート構造
Ｃ１：回転中心
ＳＷ１、ＳＷ２、ＳＷ３：シール量 10: Butterfly valve (valve)
12: Seat ring 12i: Inner peripheral surface 14: Valve body 14s: Outer peripheral surface 16: Inner peripheral seal structure 18 (1): First sealing surface 18 (1) ex: Continuous first sealing surface 18 (2): Second Seal surface 18 (2) ex: Continuous second seal surface 18 (3): Locking seal surface 18 (3) ex: Continuous locking seal surface 20: Locking convex portion 20ex: Continuous locking convex portion 22: Valve rod 24: Seat side valve rod hole 26: Valve body side valve rod hole 28: Valve body side contact surface 30: Seat side contact surface 31: Seat connecting surface 32: Valve body connecting surface 32si: Side side 33: Seat side contact surface 34: Sheet structure C1: Rotation center SW1, SW2, SW3: Seal amount

Claims (5)

バルブのシートリングに備えられ、該シートリングの内周面から膨出し、流体圧力が負荷される弁体の外周面が当接する内周シール構造であり、
凹面形状であり、前記弁体の前記外周面が当接して停止可能な第１シール面と、
前記弁体が係止され、該弁体の回転が規制される係止凸部と、
前記弁体が前記係止凸部に係止された時に、該弁体の前記外周面が当接して停止可能な係止シール面と、
を備え、
前記第１シール面よりも前記係止シール面の方が、前記弁体の前記外周面が入り込む深さであるシール量が大きくなるように構成された内周シール構造。 It is an inner peripheral seal structure provided in the seat ring of the valve, which bulges from the inner peripheral surface of the seat ring and comes into contact with the outer peripheral surface of the valve body to which the fluid pressure is applied.
The first sealing surface, which has a concave shape and can be stopped by contacting the outer peripheral surface of the valve body,
A locking convex portion in which the valve body is locked and rotation of the valve body is restricted,
When the valve body is locked to the locking convex portion, the outer peripheral surface of the valve body comes into contact with the locking seal surface that can be stopped.
Equipped with
An inner peripheral seal structure configured such that the locking seal surface has a larger seal amount, which is the depth at which the outer peripheral surface of the valve body enters, than the first seal surface. 前記弁体の回転により該弁体の前記外周面が移動する方向に、前記第１シール面、前記係止シール面、前記係止凸部の順に配置された請求項１に記載する内周シール構造。 The inner peripheral seal according to claim 1, wherein the first seal surface, the locking seal surface, and the locking convex portion are arranged in this order in the direction in which the outer peripheral surface of the valve body moves due to the rotation of the valve body. Construction. 凹面形状であり、前記弁体の前記外周面が当接して停止可能であり、前記第１シール面に連続する第２シール面を備え、
前記弁体の回転による該弁体の前記外周面が移動する方向に、前記第１シール面、前記第２シール面、前記係止シール面、前記係止凸部の順に配置され、
前記第１シール面よりも前記第２シール面の方が、シール量が大きくなるように構成され、
前記第２シール面よりも前記係止シール面の方が、シール量が大きくなるように構成された請求項１又は２に記載する内周シール構造。 It has a concave shape, the outer peripheral surface of the valve body is in contact with the outer peripheral surface and can be stopped, and a second sealing surface continuous with the first sealing surface is provided.
The first seal surface, the second seal surface, the locking seal surface, and the locking convex portion are arranged in this order in the direction in which the outer peripheral surface of the valve body moves due to the rotation of the valve body.
The second sealing surface is configured to have a larger sealing amount than the first sealing surface.
The inner peripheral seal structure according to claim 1 or 2, wherein the locking seal surface has a larger sealing amount than the second sealing surface. バルブのシートリングに備えられたシート構造であり、
前記請求項１又は２に記載する内周シール構造と、
前記弁体の回転中心を構成する弁棒が挿入されるシート側弁棒孔と、
前記シート側弁棒孔の周辺に設けられ、前記弁体が有する弁体側弁棒孔の周辺の弁体側当接面が当接されるシート側当接面と、
前記第１シール面に連続し、前記シート側当接面まで延びる連続第１シール面と、
前記係止凸部に連続し、前記シート側当接面まで延びる連続係止凸部と、
前記係止シール面に連続し、前記シート側当接面まで延びる連続係止シール面と、を備え、
前記連続第１シール面、前記連続係止凸部、及び連続係止シール面は、前記弁体の前記外周面と弁体側当接面との間に連接された弁体連接面の側辺に対して、当接した時に全体が密着する形状を有するシート構造。 It is a seat structure provided in the seat ring of the valve.
The inner peripheral seal structure according to claim 1 or 2,
The seat side valve rod hole into which the valve rod constituting the rotation center of the valve body is inserted,
A seat-side contact surface provided around the seat-side valve rod hole and to which the valve body-side contact surface around the valve body-side valve rod hole of the valve body is in contact with the seat-side contact surface.
A continuous first sealing surface that is continuous with the first sealing surface and extends to the sheet-side contact surface,
A continuous locking convex portion that is continuous with the locking convex portion and extends to the sheet-side contact surface, and a continuous locking convex portion.
A continuous locking seal surface that is continuous with the locking seal surface and extends to the sheet-side contact surface is provided.
The continuous first sealing surface, the continuous locking convex portion, and the continuous locking sealing surface are formed on the side sides of the valve body connecting surface connected between the outer peripheral surface of the valve body and the valve body side contact surface. On the other hand, a sheet structure having a shape in which the whole is in close contact when abutted. 前記請求項１～３のいずれかに記載する内周シール構造を含むバルブ。 A valve including the inner peripheral seal structure according to any one of claims 1 to 3.
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Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3356511B2 (en) * 1993-12-01 2002-12-16 株式会社オーケーエム Butterfly valve
JP2848798B2 (en) * 1995-05-15 1999-01-20 昌良 山田 Butterfly valve seat ring
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JP3756113B2 (en) 2001-12-18 2006-03-15 株式会社巴技術研究所 Butterfly valve switching device
KR100800966B1 (en) * 2007-05-03 2008-02-05 정근수 Butterfly valve
CN202109011U (en) * 2011-05-16 2012-01-11 天津市滨海新区塘沽于庄橡胶厂 Butterfly valve seat
TWM465497U (en) * 2013-05-07 2013-11-11 Jakiflow Corp Self-regulating new-torq type resilient valve seat based on pressure changes
US10234040B2 (en) * 2015-04-09 2019-03-19 Rami Al-Khoury Butterfly valve with improved seat ring providing instant valve closing and uniformly increasing sealing

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KR102529296B1 (en) 2023-05-03
CN115605698A (en) 2023-01-13
WO2022018878A1 (en) 2022-01-27
TWI757062B (en) 2022-03-01

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